Case report: retroperitoneal fibrosis simulating local relapse of sarcomatoid renal cell carcinoma.

Background: Generally, retroperitoneal fibrosis is an idiopathic process that envelopes and displaces ureters, causing hydronefrosis and renal failure. CT scan is the best choice for diagnosis. Other aetiologies described are malignancies, drugs, aorta aneurisms and immunological or rheumatological diseases.

Gastric cancer in augmentation gastrocystoplasty.

A 27-year-old man operated for myelomeningocele in the neonatal period and for augmentation gastrocystoplasty at age 13 years for voiding dysfunction, was diagnosed with gastric adenocarcinoma on the stomach side of bladder augmentation. A radical cystectomy and an ileal conduit procedure were performed and the pathologist confirmed a poorly differentiated gastric adenocarcinoma. Urologists should be aware of this potential degeneration, and long-term follow-up is mandatory to detect malignization of these cystoplasties.

Nadir prostate-specific antigen best predicts the progression to androgen-independent prostate cancer.

The objective of our study was to analyze the value of prostate-specific antigen (PSA) levels before and after androgen suppression to predict the time to androgen-independent progression (AIP) in patients with advanced and metastatic prostate cancer. A series of 283 prostate cancer patients under androgen suppression as a single treatment was studied. The disease was locally advanced in 98 patients and metastatic in the remainder 185.